Siemens M7-400, S7-400 Connecting Two-Wire Transmitters , SM 431; 8 x 13 Bit: Connecting Two-Wire Transmitters

Analog Modules
5-48 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Connecting Two-Wire Transmitters
+24 V
Sensor, for example,
pressure gauge +
–
L +
M+
M-
M+
M-
M
Two-wire
transmitter
Two-wire
transmitter
+
–
M
P
P
MANA
* Connection required in the case of modules with MANA
*
Figure 5-10 Connecting Two-Wire Transmitters to an Isolated AI
SM 431; 8 x 13 Bit: Connecting Two-Wire Transmitters
Because the supply voltage for the two-wire transmitters is not fed by the SM 431;
8 x 13 Bit, you must supply the sensors separately with 24 V.
+24 V
Sensor, for example,
pressure gauge +
–MI+
M–
Two-wire
transmitter
Two-wire
transmitter
+
–
MANA
MV+
MV+
MI+
M–
MI+
MI+
M
P
P
Figure 5-11 Connecting Two-Wire Transmitters to an SM 431; 8 x 13 Bit